Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

High-Frequency Characteristics of Metal/Native-Oxide Multilayers

Published

Author(s)

Geoffrey S. Beach, Thomas J. Silva, F. T. Parker, A. E. Berkowitz

Abstract

The high-frequency magnetization dynamics of magnetically soft CoχFe100-χ metal/native-oxide multilayers were studied as a function of alloy composition (10 {less than or equal to} χ {less than or equal to} 50) using a time-domain inductive technique. The data show intrinsic resonance frequencies ranging from 2.1 to 3.7 GHz due to the variation of anisotropy field with χ. The frequencies are consistent with a simple ferromagnetic resonance (FMR) response, with the dynamical anisotropy field equal to the static anisotropy field. The large dc permeabilities, ranging from 200 to 1000, are therefore maintained at high frequency. The combination of high permeability, high resonance frequency, low damping, and a tunable anisotropy field, along with a high resistivity, make this system ideally suited to high-frequency applications.
Citation
IEEE Transactions on Magnetics
Volume
39
Issue
5

Keywords

high-frequency magnetization dynamics, high-permeability thin films, soft magnetic materials
Created September 5, 2003, Updated February 19, 2017